RMxprt BLDC电机定子接线方式可以选择吗？星三角选择？

青鸟飞鱼

如题，如果可以在哪里设置？我自己仿真一个例子总是不正确？求大神帮忙？
还有我的maxwell16。0分布图不显示是什么原因，有知道的吗？跟设置有关吗？谢谢

hakeemlee

把问题截图发出来，能更有效地解决问题。

yupoo

time=-1,改成0，或者其他时刻看看。

开关磁阻

论坛里有基础的maxwell  BLDC视频，很容易上手

luomu

第一个问题不太清楚。
第二个问题，在瞬态求解设置中第二个选项卡中要选择保存的时间点，后处理的时候才能相应时间点的结果。
再有就是楼上所说，双击图形界面左下角的Time=-1，在出现的对话框中将时间点修改成其他时刻。

zy1986

可以选，你一键过去就可以了

青鸟飞鱼

谢谢各位大神，已找到原因，我自己做的一个BLDC的仿真，电机的原始数据为48V 、60W、8P、12槽、4000RPM 、0.145NM、1.6A、反电动势系数6.35Vrms/kRPM、电阻1.8Ω、电感1.9mH，
但我的仿真结果如下，效率很低，铜耗较高，问题出在哪里，有哪位大神可以帮我看看。谢谢。

         BRUSHLESS PERMANENT MAGNET DC MOTOR DESIGN

                      File: Setup1.res


     GENERAL DATA

Rated Output Power (kW):        0.06
Rated Voltage (V):        48
Number of Poles:        8
Given Rated Speed (rpm):        4000
Frictional Loss (W):        7
Windage Loss (W):        0
Rotor Position:        Inner
Type of Load:        Constant Power
Type of Circuit:        L3
Lead Angle of Trigger in Elec. Degrees:        0
Trigger Pulse Width in Elec. Degrees:        120
One-Transistor Voltage Drop (V):        0
One-Diode Voltage Drop (V):        0
Operating Temperature (C):        20
Maximum Current for CCC (A):        0
Minimum Current for CCC (A):        0


     STATOR DATA

Number of Stator Slots:        12
Outer Diameter of Stator (mm):          56
Inner Diameter of Stator (mm):          30

Type of Stator Slot:        3
Stator Slot       
            hs0 (mm):          1
            hs1 (mm):          2.15
            hs2 (mm):          6.4
            bs0 (mm):          2.52
            bs1 (mm):          6.22
            bs2 (mm):          9.72
            rs (mm):          1.3

Top Tooth Width (mm):          3.35963
Bottom Tooth Width (mm):          3.29177
Skew Width (Number of Slots)        0

Length of Stator Core (mm):          28
Stacking Factor of Stator Core:        0.95
Type of Steel:        D23_50
Designed Wedge Thickness (mm):          2.15
Slot Insulation Thickness (mm):          0
Layer Insulation Thickness (mm):          0
End Length Adjustment (mm):          0
Number of Parallel Branches:        4
Number of Conductors per Slot:        454
Type of Coils:        21
Average Coil Pitch:        1
Number of Wires per Conductor:        1
Wire Diameter (mm):          0.19
Wire Wrap Thickness (mm):          0.04
Slot Area (mm^2):        74.8341
Net Slot Area (mm^2):        62.9187
Limited Slot Fill Factor (%):        75
Stator Slot Fill Factor (%):        38.1709
Coil Half-Turn Length (mm):          41.0961


     ROTOR DATA

Minimum Air Gap (mm):          0.5
Inner Diameter (mm):          8
Length of Rotor (mm):          28
Stacking Factor of Iron Core:        0.95
Type of Steel:        D23_50
Polar Arc Radius (mm):          14.5
Mechanical Pole Embrace:        1
Electrical Pole Embrace:        0.89326
Max. Thickness of Magnet (mm):          2.75
Width of Magnet (mm):          10.3084
Type of Magnet:        LNG34
Type of Rotor:        1
Magnetic Shaft:        No


     PERMANENT MAGNET DATA

Residual Flux Density (Tesla):        1.2
Coercive Force (kA/m):        44
Maximum Energy Density (kJ/m^3):        34
Relative Recoil Permeability:        4.49765
Demagnetized Flux Density (Tesla):        7.32422e-005
Recoil Residual Flux Density (Tesla):        0.248749
Recoil Coercive Force (kA/m):        44.0128

     MATERIAL CONSUMPTION

Armature Copper Density (kg/m^3):          8900
Permanent Magnet Density (kg/m^3):          7800
Armature Core Steel Density (kg/m^3):          7820
Rotor Core Steel Density (kg/m^3):          7820

Armature Copper Weight (kg):          0.0564969
Permanent Magnet Weight (kg):          0.0495296
Armature Core Steel Weight (kg):          0.178504
Rotor Core Steel Weight (kg):          0.0797665
Total Net Weight (kg):          0.364296

Armature Core Steel Consumption (kg):          0.609362
Rotor Core Steel Consumption (kg):          0.114728


     STEADY STATE PARAMETERS

Stator Winding Factor:        0.866025
D-Axis Reactive Inductance Lad (H):        0.00185689
Q-Axis Reactive Inductance Laq (H):        0.00185689
D-Axis Inductance L1+Lad(H):        0.00434898
Q-Axis Inductance L1+Laq(H):        0.00434898
Armature Leakage Inductance L1 (H):        0.00249209
Zero-Sequence Inductance L0 (H):        0.000467892
Armature Phase Resistance R1 (ohm):        2.93655
Armature Phase Resistance at 20C (ohm):        2.93655
D-Axis Time Constant (s):        0.000632336
Q-Axis Time Constant (s):        0.000632336

Ideal Back-EMF Constant KE (Vs/rad):        0.0213963
Start Torque Constant KT (Nm/A):        0.0214156
Rated Torque Constant KT (Nm/A):        0.0398667


     NO-LOAD MAGNETIC DATA

Stator-Teeth Flux Density (Tesla):        0.285132
Stator-Yoke Flux Density (Tesla):        0.244976
Rotor-Yoke Flux Density (Tesla):        0.0816588
Air-Gap Flux Density (Tesla):        0.110321
Magnet Flux Density (Tesla):        0.130584

Stator-Teeth By-Pass Factor:        0.00111555
Stator-Yoke By-Pass Factor:        2.32908e-005
Rotor-Yoke By-Pass Factor:        2.28224e-005

Stator-Teeth Ampere Turns (A.T):        0.88271
Stator-Yoke Ampere Turns (A.T):        0.622486
Rotor-Yoke Ampere Turns (A.T):        0.0611804
Air-Gap Ampere Turns (A.T):        55.9395
Magnet Ampere Turns (A.T):        -57.4962

Armature Reactive Ampere Turns
  at Start Operation (A.T):        176.434
Leakage-Flux Factor:        1
Correction Factor for Magnetic
  Circuit Length of Stator Yoke:        0.702247
Correction Factor for Magnetic
  Circuit Length of Rotor Yoke:        0.702247

No-Load Speed (rpm):        16905
Cogging Torque (N.m):        0.00388303


     FULL-LOAD DATA

Average Input Current (A):        3.17635
Root-Mean-Square Armature Current (A):        3.06109
Armature Thermal Load (A^2/mm^3):        1193.99
Specific Electric Loading (A/mm):        44.2367
Armature Current Density (A/mm^2):        26.991
Frictional and Windage Loss (W):        9.12135
Iron-Core Loss (W):        0.798323
Armature Copper Loss (W):        82.5489
Transistor Loss (W):        0
Diode Loss (W):        0
Total Loss (W):        92.4686
Output Power (W):        59.9963
Input Power (W):        152.465
Efficiency (%):        39.3509

Rated Speed (rpm):        5212.2
Rated Torque (N.m):        0.109919

Locked-Rotor Torque (N.m):        0.507399
Locked-Rotor Current (A):        24.4733


     WINDING ARRANGEMENT

The 3-phase, 2-layer winding can be arranged in 3 slots as below:

ABC


Angle per slot (elec. degrees):        120
Phase-A axis (elec. degrees):        60
First slot center (elec. degrees):        0



     TRANSIENT FEA INPUT DATA

For Armature Winding:
  Number of Turns:        908
  Parallel Branches:        4
  Terminal Resistance (ohm):        2.93655
  End Leakage Inductance (H):        3.03955e-005
2D Equivalent Value:
  Equivalent Model Depth (mm):        28
  Equivalent Stator Stacking Factor:        0.95
  Equivalent Rotor Stacking Factor:        0.95
  Equivalent Br (Tesla):        0.248749
  Equivalent Hc (kA/m):        44.0128
Estimated Rotor Moment of Inertia (kg m^2):        1.51651e-005

青鸟飞鱼

磁环材料更改为NdFe之后，效率提升了，但是还是没达到要求，是错在哪里了？如果有人知道的话，谢谢。

青鸟飞鱼

yupoo 发表于 2017-8-1 22:16
time=-1,改成0，或者其他时刻看看。

谢谢，已可以显示

lizhen2979371

你的磁密太低了，应该先算磁路法，把齿槽尺寸和永磁体尺寸大致计算出来